Portable roller welder



April 20, 1948. w. A. WEIGHTMAN PORTABLE ROLLER WELDER Filed March 29,1944 5 Sheets-Sheet 1 we. a,

R Y mm w mm M0 V n T N9 T AP m .m v MW B April 20, 1948. w. A. WEIGHTMAN2,439,834

' PORTABLE ROLLER WELDER Filed Marchv29, 1944 5 Sheets-Sheet 2 INVENTORWilliam AWeighiman BY WM. P, Tami-o A TTORNE Y April 20, 1948. w. A.WEIGHTMAN PORTABLE ROLLER WELDER Filed March 29, 1944 5 Sheets-Sheet 3INVENTOR WiHiamAWei hcmom BY WM I A TTORNE Y April 20,- 1948. w. A. WElGHTM AN 2,439,834

PORTABLE ROLLER WELDER F iled March 29, 1944 s Sheets-Sheet' 4 1 N V ENTOR William A .Weightmafi ATTORNEY April 20, 1948.- w. A. WEIGHTMAN I2,439,834

PORTABLE ROLLER WELDER BY gnim 7 T ATTORNEY Patented Apr. 20, 1948PORTABLEROLLER WELDER William A. Weightman, Philadelphia, 'Pa., as-

- signor to The Budd Company, Philadelphia, Pa., a corporation ofPennsylvania Application March 29, 1944, Serial No. 528,577

. 1 This invention relates to roller welders, particularly to portableroller welders, and-has foran object the provision of improvements inthis art.

One of the particular objects is to provide a roller welder in whichboth rolls are positively driven to avoid slippage of one or the otherrolls v on the stock.

Another object is to provide a portable roller welder in which separatedrive motors are Another object is to provide a turnable mounta ing forthe entire roller welder assembly whereby the rolls may be turned withinthe supporting mounting and assume a position of stable equilibrium atany angle to the vertical.

Another object is to provide an improved pressure motor and an improvedarrangement thereof.

The above and other objects and advantages of the invention will beapparent from the following description of an exemplary embodimentthereof, reference being made to the accompanying drawings, wherein:

Fig. 1 is a side elevation of a portable roller welder embodying theinvention;

Fig. 2 is a partial horizontal section taken on the line 22 of Fig. 1;

Fig. 3 is an end elevation taken at the left of Fig. 1, parts on thepivot axis being broken away to reveal internal structure;

Fig. 4 is an enlarged end elevation taken at the right of Fig. 1;

Fig. 5 is a vertical section and elevation taken on the line 5-5 of Fig.3; and

Fig. 6 is a vertical section taken on the line 66 of Fig. 1.

Referring to the drawings, the welder comprises the welder assemblyproper A carried by a support B, the support here being in the form of agimbal ring provided with a suspension eye l0. As shown in Figs. 3, 4and 5, a ball bearing assembly H is disposed in grooves between thegimbal rings.

The welder assembly proper A comprises two generally symmetrical partsAl and A2 comprising frames l2, l3, drive motors l4, l5 and weldingrolls l6, IT. The frames l2, I3 are, in effect, arms or levers which arepivoted together in the fashion of scissors by a hinge shaft 2!). Thearms are operated by a pressure motor 2| connected by pivot pins 22, 23to arm extensions 24, 25. In

14 Claims. (Cl. 219-4) the present embodiment, the motor is of the fluidoperated piston type with the cylinder element connected to the pin 22and the piston element connected to the pin 23. The latter connection isadjustable as by spaced nuts 25 on the threaded stem 21. To obtain heavypressure in a small space, tandem pistons are employed, fluid, such asair, being admitted at nipples 30 and 3! on the head end to press therolls together upon the stock and at nipple 32 on the rod end to movethe rolls apart.

The rolls l6, I! are mounted on shafts 35, 36 carried by bearings formedin the frame parts. They are driven by the fluid drive motors I 4, l5through suitable Speed reduction gearing 3T. The motors are preferablyair driven and of the multiple axial-piston wabble plate type, thepistons and shafts being aligned with the roll axes for conservation ofspace and balance within the gimbal ring and also to minimize vibrationtransversely of the roll shafts. Air feed tubes 39 with throttle valves39a to equalize the action of the motors are shown.

The rolls and their frames are adjustable relative to each other to takecare of changed roll sizes or different stock thickness while keepingthe roll planes aligned in work-engaging position. This is accomplishedby providing guide loops 40 on one frame, the lower here, whichembrace'the pivot shaft 20 and guide blocks 4| secured thereon.Adjusting movement is produced by screws 42 threaded in the shaft 20 andprovided with locknuts 43 and cotter pins 44 to maintain adjustedposition. The pivot shaft 20 is turnably mounted in end bearing brackets45 secured by bolts 46 to seats 4! inside the inner gimbal ring. By thisarrangement the arms may be adjusted when desired or readily separatedcompletely.

Coolant, such-as water, is circulated through a passage 49 in the rollshafts 35, 36 by pipes 50, 5|, pipe connections 52, 53, and flexibletubes carried upward to the overhead support, ample slack being providedfor the turning movement of the welder in its gimbals.

The air lines for the several motors and the power leads are likewisecarried upward to a support with ample length to permit turning of thewelder in its bearing support without material resistance.

The operation and advantages of the apparatus will be evident to thoseskilled in the art from the foregoing description.

While one embodiment of the invention has been described for purposes ofillustration, it is to be understood that the invention may be vari- 2.A portableroller welder comprisingspaced; arms carrying welding rollsmounted for rotation and for movement relative to each other, a drivemotor on each arm geared to drive a roll, and a pressure motor mountedbetween the armsfor moving the rolls relative to each other.

3. A portable roller welder comprising; iiQllBlE-m supporting armspivoted for movementof-the rolls relative to each other, and meansformingpart of the pivot connection tor adjustingthe spacing of one armrelative to the other.

4. A portable roller welder comprising 'rollsupporting arms pivotedrformovement of the rol s relativ to ea h Oth r, m ti ressure means; orInc-rips sa d ar andro l re at ve toeach t er, means r adil s ns a szarms elatiye V to a h. oth throu h: the p vot cannon? ioaand mea s forad us i h arms re a ive to ach. ot erthr ueh he m iverr ssu means.

-';A.p0rtab1. oller W lder com risin scis or arms car n r l s-t n seto te a m ax s, a dsmeans for a ust aid. ms a unit a plane which isgenerally parallel to, the plane of the rolls, whereby the relativeposition of the, rolls. is han edarms,

7- A portab e o l welder ompr s n mo t d o a p v t, W l n ro s, m u tedfor.- otation on ax s. p r e to he am z s. an air drive m t r on a h a mha n -,2. p ston a i parallelto'the armaxis, and a reciprocatingmotormounted between the arms.

A. p ab ler weld r compr sing. arms mo ted on a p v0 w d g rol s.mounted for. rotation on. x s p a tolthe armaxesanair: d ve. mQtQ on,ach. maving, a pis nr axis pa alleltq he ar is, nd a ec ocating mo:tor-mounted b tw n the a ms-the drivesmotors.

be z'ram un don pposit s des f he-pr ssure 9, aan ab e rol r we de 'cmnrisin arms.

mounted o a piv t, W d g r l s mountedzfor said supporting meansincluding a gimbal ring positioned with its plane parallel to the planeof the welding rolls and adjacent the drive motors.

10. A portable roller welder and a support therefor comprising coactingcoplanar electrode rollers, relatively movable arms for supporting saidrollers, and a supported gimbal ring in which thearms are rotatablymounted, the-plane of the gimbal ring being parallel to the plane of thewelding rolls.

11. A portable roller welder comprising a support, juxtaposed armsmounted on the support, rollers attached to said arms, pivot means forsupporting said. arms to permit relative cooperative movement-betweensaid rollers, and means for adjustlng'th'e spacing of the rollersrelative to eachother. V

12; A portable roller welder comprising a support, juxtaposed armsmounted on the support, rollers attached to said arms, pivot means forsumwrting said arms to permit relative cooperative movement between saidrollers, and shifting means for shifting the pivot relative to thesupport whereby the relative position of the rollers s od fi 13 .Aportable-welder comprising coacting coplanar electrodes, relativelymovable arms. for supporting and moving said electrodes into and out of.engagement with each other, and a gimbal ring for supporting said armsrotatably, the planes including" said g-imbal and the electrodesbeingparallel,

14. A portable roller welder-comprising coact ing arms, a common pivotforsaid arms,'bearing means forsupporting saidepivot at varied pointsoiadjlfitmentrelative to said arms, andmeans for moving said bearingmeans.

A. WEIGHTMAN.

REFERENCES CITED The following references are of record 'in the file ofthis patent;

UNITED STATES PATENTS Number Name Date 1,248,927 Schkommodan' Dec.14,1917 1,291,501 Hatch Jan. 14, 1919 1,310,127 Merrill' July 15,19191,993,961 Groven et 'al. Mar; 12, 1935 2,023,086 LaVallee Dec, 3, 19352105,90? Demers Jan. 18, 1938 2,206,549 McIntosh etal July 2, 19402,227,249 Ganahl Dec; 31, 1940 2,236,403 Kaunitz Dec. 7, 1943 FOREIGNPA'I'ENTS Number Country Date.

670,694. Germany:- Jan. 23, 1939

